background preloader


Facebook Twitter

Sensors | Free Full-Text | Fibre Optic Sensors for Structural Health Monitoring of Aircraft Composite Structures: Recent Advances and Applications. Department of Industrial Engineering—DIN, University of Bologna, Forlì 47121, Italy Academic Editor: Vittorio M.N. Passaro Received: 24 May 2015 / Revised: 3 July 2015 / Accepted: 23 July 2015 / Published: 30 July 2015 In-service structural health monitoring of composite aircraft structures plays a key role in the assessment of their performance and integrity. This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. MDPI and ACS Style Di Sante, R. View more citation formats AMA Style Di Sante R.

Chicago/Turabian Style Di Sante, Raffaella. 2015. Where Do I Start? » the memory palace. Radiotopia Forever - 99% Invisible. Frequency Schedule for BBC in ENGLISH at 01:30GMT. The Sproutie “SPT” Beacon – A Legal, Unlicensed HiFER Beacon | Dave Richards AA7EE. Note – this blog-post discusses the use of the 13553 – 13567KHz band under FCC Part 15 regulations in the US. Although it is a worldwide allocation, rules vary according to where you are. Off the top of my head, I do know that there are HiFER beacons operating in some countries on the European continent, but that is the extent of my knowledge of this type of operation outside the US. Before saying anything else, I must note that even though the earlier projects which were named after my cats were not my designs, I did at least contribute enough of my own input that I could perhaps get away with naming them. I’m not sure that is the case with this venture, as I simply re-purposed it for a slightly different band and usage.

However, the urge to name things around here after my cats is strong, so what I am calling The Sproutie Beacon, is really an original Hans Summers QRSS TX, modified slightly for the 15553 – 13567KHz HiFER band. A few more views of the board – A dialog box appears. WAVELENGTH — shortwaveology. Mundo da Rádio - base de dados de emissores - Onda Média. RDP - Antena 1 Açores | RDP - Antena 2 | RDP - Antena 3 Açores | Rádio Renascença | RFM | Rádios locais Onda Média (MF/OM) - 531 ~1602 kHz Portugal continental / Madeira / Açores Base de dados de emissores em Onda Média (Portugal / Madeira / Açores): Actualização: 01 Mai 2015 Emissores MF/OM inactivos ou definitivamente desligados: Esta página será actualizada sensivelmente de 6 em 6 meses, recorrendo às informações constantes da Base de Dados alojada no Google Drive do "Mundo da Rádio". (CC) Luís Carvalho - alguns direitos reservados O site "Mundo Da Rádio" encontra-se disponível sob licença Creative Commons Attribution-NonCommercial 3.0 Unported License.

Questões relacionadas com o licenciamento do conteúdo desta página devem ser encaminhadas para o endereço electrónico: mundodaradio <arroba> .


Smartphone fm. Aircraft Band Receiver. Ssb tuning. PL880 hidden function you may not know these features of the tecsun radio Pl880. You may not know these features of the tecsun radio Pl880? So let me tell you. Under [ Off ] mode, press the [ AM BW ] key – the first time that full-screen symbols ; second time to display the software version number ( eg 8820 ) , LSB, this short time and then turn off the synchronous detection by LSB ) Under [ Off ] mode, press [ VF / VM ] key – Display battery life MW calibration: 1.MW transferred to any strong station 2.Open the SSB mode (USB / LSB can ) 3.

Adjust the trimmer until you hear a good jog SSB signal ( that is a good tune zero beat ) 4.Press and hold SNOOZE button , you see a return correct value is displayed. 5.Press the SNOOZE button. RPi Low-level peripherals. Back to the Hub. Hardware & Peripherals: Hardware and Hardware History. Low-level Peripherals and Expansion Boards. Screens, Cases and Other Peripherals. Introduction In addition to the familiar USB, Ethernet and HDMI ports, the Raspberry Pi offers the ability to connect directly to a variety of electronic devices.

Digital outputs: turn lights, motors, or other devices on or off Digital inputs: read an on or off state from a button, switch, or other sensor Communication with chips or modules using low-level protocols: SPI, I²C, or serial UART Connections are made using GPIO ("General Purpose Input/Output") pins. Note that no analogue input or output is available. Links For further specific information about the Raspberry Pi's BCM2835 GPIOs, see: RPi BCM2835 GPIOs. Model A and B (Original) The Raspberry Pi Model A and B boards have a 26-pin 2.54 mm (100 mil)[1] expansion header, marked as P1, arranged in a 2x13 strip. Revision 1 PCBs also do not have the P5 header (see below). Useful P2 pins: Turning the Raspberry Pi Into an FM Transmitter - Imperial College Robotics Society Wiki. Steps to play sound: (Created by Oliver Mattos and Oskar Weigl. Code is GPL) sudo python >>> import PiFm >>> PiFm.play_sound("sound.wav") Now connect a 70cm (optimally, ~20cm will do) or so plain wire to GPIO 4 (which is pin 7 on header P1) to act as an antenna, and tune an FM radio to 103.3Mhz.

Download the module here: [Download Now!] (this contains both source and a ready to go binary. New! Sudo . How to change the broadcast frequency Run the . The second command line argument is the frequency to transmit on, as a number in Mhz. Sudo . It will work from about 1Mhz up to 250Mhz, although the useful FM band is 88 Mhz to 108 Mhz in most countries. Most radio receivers want a signal to be an odd multiple of 0.1 MHz to work properly.

The details of how it works Below is some code that was hacked together over a few hours at the Code Club pihack. If you're v. smart, you might be able to get stereo going! Accessing Hardware.


A Review of the Bonito 1102S RadioJet 24 bit IF Receiver | The SWLing Post. Bonito’s Dennis Walter at the Bonito booth in Hara Arena at the 2012 Dayton Hamvention At the Dayton Hamvention this year, I met Dennis Walter, who is with Bonito, German manufacturer of the 1102S RadioJet. Dennis was kind enough to loan us a radio for review on I have been evaluating the Bonito 1102S RadioJet over the course of eight weeks and have formed some impressions about its performance. And while I haven’t made any A/B comparisons yet with either the Microtelecom Perseus or the WinRadio Excalibur–both on my review table at the moment–I have taken the time to get to know this lean, high-performance IF receiver. First impressions The RadioJet box (left) is about the size of the highly portable Tecsun PL-380 (right) When I first held the RadioJet, I was amazed at how small and sturdy the unit is. And though I knew about this feature in advance, what really stands out is its lack of dependence upon a power cable or a DC-in jack on the back of the unit.

Plug and play Summary. Meet FM antenna design challenges in portable devices. To save this item to your list of favorite EE Times content so you can find it later in your Profile page, click the "Save It" button next to the item. Latest News Semiconductor News Blogs Message Boards Advanced Technology Analog Boards/Buses Electromechanical Embedded Tools FPGAs/PLDs Logic & Interfaces Memory Operating Systems Optoelectronics Passives Power Processors RF/Microwave Sensors & Transducers Test & Measurement ARM Techcon DesignCon Designers of Things EETimes University Tech Papers Courses Fundamentals Webinars Design West ARM Techcon. Km4efp/pifox. TECSUN PL-880. Details TECSUN’s latest high-end radio receiver has arrived: PL-880.

Equipped with analogue High-IF circuit, multi-conversion and DSP decoding technology, PL-880 has great performance in its sensitivity, selectivity and the interference of mirror stations (image rejection). Besides these technological advances, the introduction of the Auto Sorting Memory function in Tecsun’s latest top receivers provides greater user friendliness and convenience in using stored stations. And to further enhance listening enjoyment, PL-880 is fitted with Class AB type Audio Power Amplifiers and ultra-dynamic full range speakers.

Special Functions: Multi-conversion processing of incoming radio signals to reduce interference. Squelch control SW Single Side Band (SSB): individual reception of Upper Side Band (USB) and Lower Side Band (LSB) Auto-sorting memory: sorting stored stations automatically according to meter band and frequency, removes duplicate stations. Frequency Range: 520 - 1710 kHz (band step 10 kHz) Where radio history and art meet: An interview with Geoffrey Roberts | The SWLing Post. Fanciful and functional: A Marconi Mk III crystal shortwave tuner set in the service of Australian signallers. (Photo: Wikimedia Commons) At the SWLing Post, we love radio history and that of technology in general; clearly, steps taken in our past indicate how we will blaze trails into our future. But that’s not the only reason to appreciate vintage technologies. Developed in an environment with limited resources and infrastructure, the forms these technologies often took were resultingly unique: hand-wrought, self-servicing, robust, efficient, interactive, engaging, elegant, and sometimes truly magical.

And in the world of radio, form simply couldn’t follow function more intimately than in a crystal radio. Even the name is magical, suggesting, perhaps, a receiver which culls sound waves from clear stone, or unleashes ancient voices long immured in ice. My first crystal radio set was made with a Quaker Oatmeal box, a bunch of wire, and a small earpiece. Introducing Geoffrey Roberts. All Things Radio. Thanks to a blog posting over at I just found out Heathkit is back and about to release their first build-it-yourself kit, with the promise of many more to come. Heathkit, for those who may not be familiar with the name, was a legendary producer of kit radios (and TVs, and even computers) long ago. As great as the kits were, the instruction manuals were like an electronics course in themselves. While I missed out on that experience during my misspent youth, I have often thought I might someday buy an assembled radio from that time and pair it with an original instruction manual and work in reverse.

I would disassemble the radio working backward through the manual, and then reassemble it from the beginning. While I would still love to do this, I am also excited to hear the plans for Heathkit to release products rivaling the kits of yesteryear, with the same attention to detail and the same style of detailed instruction manuals. Here’s to the magic!

73, Robert. The Radio Kitchen.